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Comprehensive Income (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ 22	$ 24	$ 91	$ 51
Other comprehensive income - Change in compensation retirement benefits liability and amortization, net of taxes	0	0	0	1
Comprehensive income and Comprehensive income attributable to Portland General Electric Company	$ 22	$ 24	$ 91	$ 52

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- Definition

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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